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Dynamic material flow analysis of silicon photovoltaic modules to support a circular economy transition

机译:硅光伏组件的动态物料流分析,支持循环经济转型

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Abstract Solar photovoltaics (PV) are the fastest growing renewable energy technologies for clean, cheap, and sustainable electricity generation. To prepare for rapid scale‐up, the PV industry needs to project material requirements to build out all aspects of the supply chain appropriately and plan to handle large volumes of module waste. Impacts of deploying different material circularity strategies to reduce waste and conserve primary resources need to be quantified to inform sustainable material management. Here, we introduce the photovoltaic dynamic material flow analysis (PV DMFA) model based on PV electricity generation. The model quantifies material flows and stocks in the cradle‐to‐cradle life cycles of utility‐scale c‐Si PV systems in the United States through 2100. We present case studies for solar flat glass and aluminum frame materials under various scenarios to project the impacts of PV performance, reliability, and processing parameters, material circularity strategies, and module design shifts. In the absence of circularity measures, ~100 million MT of flat glass and ~12 million MT of aluminum would be needed for PV installations by 2100 to meet projected growth in domestic utility PV demand to nearly 1000 TWh in 2100. With optimistic but feasible improvements in efficiency, reliability, and circularity, material intensity and waste could be reduced by nearly 50. Efficient module collection, minimally intrusive recycling, and careful scrap handling and cleaning could improve material circularity in the PV value chain. This model serves as a sustainability data support tool that may aid in the circular economy transition for PV systems.
机译:摘要 太阳能光伏发电是发展最快的可再生能源技术,用于清洁、廉价和可持续的发电。为了为快速扩大规模做好准备,光伏行业需要预测材料需求,以适当地建立供应链的各个方面,并计划处理大量的组件废物。需要量化部署不同材料循环策略以减少浪费和节约初级资源的影响,以便为可持续材料管理提供信息。在这里,我们介绍了基于光伏发电的光伏动态物料流分析(PV DMFA)模型。该模型量化了到 2100 年美国公用事业规模的硅光伏系统从摇篮到摇篮生命周期中的物质流动和库存。我们介绍了太阳能平板玻璃和铝框架材料在各种情景下的案例研究,以预测光伏性能、可靠性和加工参数、材料循环策略和组件设计转变的影响。在没有循环措施的情况下,到 2100 年,光伏装置将需要 ~1 亿吨平板玻璃和 ~1200 万吨铝,以满足 2100 年国内公用事业光伏需求增长到近 1000 TWh 的预计增长。通过在效率、可靠性和循环性方面进行乐观但可行的改进,材料强度和浪费可以减少近 50%。高效的组件收集、最小的侵入性回收以及仔细的废料处理和清洁可以提高光伏价值链中的材料循环性。该模型可作为可持续性数据支持工具,可能有助于光伏系统的循环经济转型。

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